Luke Plunkett

Danish company Monstrum may sound terrifying, but they do amazing work, building children's playgrounds across Europe that look more like fantasy arenas than the dirty old contraptions most of us grew up with.

Founded in 2003, Monstrum takes playground design very seriously, building with things like Siberian larch, Robinia wood and birch plywood, which the company say helps them last for up to 40 years.

"We meet boys that like pink and girls that likes trees", the company's website says, "so why only play on a monky frame and a sandbox, when you can play in a moon crater or a submarine or a giant spider or an enormous snail or a Trojans horse or a rocket or an ant or a princess castle."